Windows & python:
The serial number is the only element that does give a blank results on all devices via hid.enumerate.
Example:
Path: b'\\?\HID#VID_046D&PID_C534&MI_01&Col04#8&103104c3&0&0003#{4d1e55b2-f16f-11cf-88cb-001111000030}'
Vendor ID: 1133
Product ID: 50484
Serial Number:
Release Number: 10497
Manufacturer: Logitech
Product: USB Receiver
Usage Page: 65280
Usage: 1
USB Interface: 1

Python file;

import hid

Enumerate HID devices

devices = hid.enumerate()
for device in devices:
print(f"Path: {device['path']}")
print(f"Vendor ID: {device['vendor_id']}")
print(f"Product ID: {device['product_id']}")
print(f"Serial Number: {device['serial_number']}")
print(f"Release Number: {device['release_number']}")
print(f"Manufacturer: {device['manufacturer_string']}")
print(f"Product: {device['product_string']}")
print(f"Usage Page: {device['usage_page']}")
print(f"Usage: {device['usage']}")
print(f"USB Interface: {device['interface_number']}")
print("-" * 40)

What am I missing?